An invariance principle in k-dimensional extended renewal theory
Keyword(s):
Let ·be a sequence of k -dimensional i.i.d. random vectors and define the first-passage times for where (cvτ)v, τ= 1,· ··,k is the covariance matrix of In this paper the weak convergence of Zn in (D[0, ∞))k is proved under the assumption (0,∞) for all v = 1, ···, k. We deduce the result from the Donsker invariance principle by means of Theorem 5.5 of Billingsley (1968). This method is also used to derive a limit theorem for the first-exit time Mn = min{Nnt for fixed t1,···, tk > 0. The second result is an extension of a theorem of Hunter (1974) whose method of proof applies only if Ρ (ξ1 [0,∞)k) = 1 and μ ν = tv for all v = 1, ···, k.
1979 ◽
Vol 16
(03)
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pp. 567-574
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1981 ◽
Vol 13
(01)
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pp. 113-128
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1984 ◽
Vol 16
(04)
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pp. 766-803
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1985 ◽
Vol 22
(02)
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pp. 280-287
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1993 ◽
Vol 7
(4)
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pp. 545-555
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